/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.iotdb.tsfile.file.metadata.enums;

import java.io.DataOutputStream;
import java.io.IOException;
import java.nio.ByteBuffer;

/**
 * The type of MetadataIndexNode
 *
 * <p>INTERNAL_DEVICE: internal nodes of the index tree's device level LEAF_DEVICE: leaf nodes of
 * the index tree's device level, points to measurement level INTERNAL_MEASUREMENT: internal nodes
 * of the index tree's measurement level LEAF_MEASUREMENT: leaf nodes of the index tree's device
 * level, points to TimeseriesMetadata
 */
public enum MetadataIndexNodeType {
    /**
     * INTERNAL_DEVICE
     */
    INTERNAL_DEVICE((byte) 0),

    /**
     * LEAF_DEVICE
     */
    LEAF_DEVICE((byte) 1),

    /**
     * INTERNAL_MEASUREMENT
     */
    INTERNAL_MEASUREMENT((byte) 2),

    /**
     * INTERNAL_MEASUREMENT
     */
    LEAF_MEASUREMENT((byte) 3);

    private final byte type;

    MetadataIndexNodeType(byte type) {
        this.type = type;
    }

    /**
     * deserialize byte number.
     *
     * @param i byte number
     * @return MetadataIndexNodeType
     */
    public static MetadataIndexNodeType deserialize(byte i) {
        switch (i) {
            case 0:
                return MetadataIndexNodeType.INTERNAL_DEVICE;
            case 1:
                return MetadataIndexNodeType.LEAF_DEVICE;
            case 2:
                return MetadataIndexNodeType.INTERNAL_MEASUREMENT;
            case 3:
                return MetadataIndexNodeType.LEAF_MEASUREMENT;
            default:
                throw new IllegalArgumentException("Invalid input: " + i);
        }
    }

    public static MetadataIndexNodeType deserializeFrom(ByteBuffer buffer) {
        return deserialize(buffer.get());
    }

    public static int getSerializedSize() {
        return Byte.BYTES;
    }

    public void serializeTo(ByteBuffer byteBuffer) {
        byteBuffer.put(serialize());
    }

    public void serializeTo(DataOutputStream outputStream) throws IOException {
        outputStream.write(serialize());
    }

    /**
     * return a serialize child metadata index type.
     *
     * @return -enum type
     */
    public byte serialize() {
        return type;
    }
}
